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Manufacturing method for muddy loosing sand stone core

A production method and core technology are applied in the preparation, sampling, measuring device and other directions of test samples, which can solve the problems of high clay mineral content, difficulty in meeting production requirements, weak bonding strength, etc., and achieve the production method is simple and easy to operate, The core has excellent repeatability and avoids the effect of easy fracture

Inactive Publication Date: 2017-08-29
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Compared with conventional oil and gas reservoirs, argillaceous unconsolidated sandstone oil and gas reservoirs generally have the characteristics of shallow burial, looseness and looseness, poor compaction diagenesis, high clay mineral content, low permeability, weak bonding strength, and high crude oil viscosity. The injection-production process is difficult to meet the production demand, so shale unconsolidated sandstone oil and gas reservoirs often need to be fractured before development. By creating fractures in the reservoir, the oil and gas seepage capacity of the reservoir can be improved, and the oil and gas recovery can be improved.

Method used

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  • Manufacturing method for muddy loosing sand stone core

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Embodiment Construction

[0009] In order to enable those skilled in the art to better understand the technical solution in the present invention, the solution will be clearly and completely described below in conjunction with examples in the present invention.

[0010] Choose quartz sand epoxy resin cemented artificial core production method, and obtain the argillaceous loose sandstone core of Well X, which accounts for 72% of quartz sand, 13% of illite, 7% of montmorillonite, and 2% of kaolinite and chlorite. %, albite, potassium feldspar, plagioclase 2%, calcite, dolomite, siderite 3%, quartz sand particle size 2 1.4g / L, CaCl 2 0.4g / L, Na 2 SO 4 It is 1.4g / L. According to similar properties, albite, potassium feldspar, and plagioclase are classified into quartz sand, accounting for 75%, illite, montmorillonite, kaolinite, and chlorite are classified into clay, accounting for 22%, and calcite, Dolomite and siderite account for 3% of the cement, that is, the mass ratio of quartz sand, clay, and epo...

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Abstract

The invention relates to the field of petroleum exploitation and specifically relates to a manufacturing method for a muddy loosing sand stone core. The method comprises the following steps: firstly, acquiring mineral composition and proportion, grain size and stratum water component of a target reservoir section; selecting corresponding raw materials; confirming pressing pressure according to the overlying rock pressure of the stratum of the core; adopting epoxy resin cementation for manufacturing the core; acquiring porosity, permeability, Young modulus, uniaxial compressive strength and poisson ratio of the core of the target reservoir section; endowing a weighting coefficient; determining the porosity, permeability, Young modulus, uniaxial compressive strength and poisson ratio of an artificial core; acquiring the relative errors and total deviation by comparing with various parameters of the true core; if the deviation is larger, adjusting the pressing pressure and the cement content till the core parameters meet the simulation requirement.

Description

technical field [0001] The invention relates to the field of petroleum development, in particular to a method for making argillaceous loose sandstone cores. Background technique [0002] As the recoverable reserves and new proven reserves of conventional oil and gas resources decrease year by year, petroleum scientists have to shift their development targets to unconventional oil and gas resources, including muddy unconsolidated sandstone oil and gas reservoirs. Compared with conventional oil and gas reservoirs, argillaceous unconsolidated sandstone oil and gas reservoirs generally have the characteristics of shallow burial, looseness and looseness, poor compaction diagenesis, high clay mineral content, low permeability, weak bonding strength, and high crude oil viscosity. The injection-production process is difficult to meet the production demand, so shale unconsolidated sandstone oil and gas reservoirs often need to be fractured before development. By creating fractures in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28
CPCG01N1/286
Inventor 张卫东杨琛王绪性朱跃成关旭辉渠源瀚
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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